As the title alludes to, I am trying to find the ECT (Engine Coolant Temperature) Sensor 1 location, as I am having trouble finding it.


The reason that I am trying to find this ECT Sensor and replace it, is because my radiator cooling fans recently stopped working, and it seems that the ECT may not be sending the information, after the engine has heated up, so that the computer can turn the cooling fans on and start to cool down the engine. As it currently is, the engine heats up extremely quickly, within, 3-4 minutes of driving. And it does this, every time that I try to drive somewhere.


FYI, I have turned on the A/C and it immediately kicked on the radiator's cooling fans. So, the radiator fans, themselves, are still working. However, other than, turning on the air conditioning, the fans will not turn and start spinning, no matter, how hot that the engine gets.


Also, FYI, earlier today, I replaced ECT Sensor 2 (after, seemingly, unnecessarily spending $50 on a new Duralast ECT Sensor), which was located on the bottom driver's side area of the radiator. And I actually have two OEM Honda ECT Sensors on the way to my home, that I bought on eBay, for $12 each. However, they will likely not be here, for another few days; and I really need to try to get my CR-V fixed and get it to stop overheating, by Thursday, June 4th, which is the day after tomorrow. So, that is why I went and spent $50 on the Duralast ECT, at my local Auto Zone store.


Well, unfortunately, after spending $50 on that Duralast ECT and installing it earlier today, it did not help, as the radiator fans are still not turning on (unless, I turn on the A/C). So, that is why I am now trying to find the location of ETC Sensor #1, so that I can try installing the old ECT that I just removed earlier today, and see if that causes the fans to start working again.


Also, it sounds like there might be a fuse, or a relay, or some type of switch, that may be preventing the radiator cooling fans from turning on, after the engine heats up. However, I know very little about this stuff. So, if anyone would like to suggest any other potential fixes (fuses or relays to check, and the fuse/relay # or location), or some additional radiator fan troubleshooting steps, please, feel free to let me know. I would really appreciate any help that I could get.


Btw, I'm gonna try to post some photos of my engine compartment, that I just took. And I just removed the throttle body air intake house, because, after researching online, it seemed that ETC Sensor #1 was located somewhere on the driver's side of the engine block, in/below the area air intake hose. Although, I also read something that suggested that ECT Sensor 2 is on the bottom of the engine block, near the thermostat housing. However, even, after removing the air intake hose, I still can not find the ETC Sensor location.


Also, one more thing: Does anyone know, for certain, which ECT Sensor (1 or 2) controls the radiator cooling fans??


Sorry, for the long post. And as always, I would be genuinely grateful, for some helpful replies.


Edit: Am I correct, in that both of the ETC Sensors (1 and 2) are the exact same part and are interchangeable?? Or, are they different ETC Sensor part numbers?


Edit 2: I think that I may have found ECT Sensor 1 (or whichever ECT Sensor, is located on the engine block, below the throttle body), but, it looks to require a much larger wrench, than what the ETC Sensor (17 MM) needed. Is that right?? Or, as I just now suspected, while typing this, does that mean that I did not find the other ECT Sensor and, instead, found some other part??


Edit 3: Is there some way that I could connect some power wires, so that the radiator cooling fans are always running, while I'm driving? And I could put in a toggle switch, or just disconnect the power/ground wire, if I need to?? Or, would this be a bad/potentially harmful thing, to always have the radiator fans running, while driving??



Photos of my 2008 CR-V's engine compartment:

 

ECT 2 is the sensor that is used primarily by the PCM to turn on the fans when the coolant temperature is very high.


ECT 1 is under the middle of the engine. So, you likely did find it.

Honda parts show different part numbers for ECT 1 and ECT 2.